Effect of superficial velocity on liquid injectivity in SAG foam EOR. Part 2: Modelling

FUEL

卷:279

Article

Gong, Jiakun¹  Martinez, Wendy Flores¹  Vincent-Bonnieu, Sebastien^1,2  Bahrim, Ridhwan Zhafri Kamarul³  Mamat, Che A. Nasser Bakri Che³  Tewari, Raj Deo³  Amir, Mohammad Iqbal Mahamad³  Farajzadeh, Rouhollah^1,2  Rossen, William¹ 

[1] Delft Univ Technol, Dept Geosci & Engn, NL-2628 CN Delft, Netherlands

[2] Shell Global Solut Int BV, NL-1031 HW Amsterdam, Netherlands

[3] PETRONAS, Kuala Lumpur 50088, Malaysia

关键词: Foam;    Enhanced oil recovery;    Surfactant-alternating-gas;    Injectivity;    Superficial velocity;    Bank-propagation model;   

DOI  :  10.1016/j.fuel.2020.118302

来源: Elsevier

【 摘 要 】

Surfactant-alternating-gas (SAG) is a favored method of foam injection, which has been proved as an efficient way for enhancing oil recovery. However, foam flow is extremely complicated, and there are still unsolved problems for foam application. One is liquid injectivity. Our previous studies suggest that the injectivity in a SAG process is determined by propagation of several banks near the injection well that are not represented by current foam models. Uniform bank properties were assumed. However, in a companion paper, our experimental results show that the dimensionless propagation velocity and the total mobility of banks during the liquid-injection period depends on superficial velocity. Shearing-thinning behavior is observed. In radial flow, the superficial velocity varies with distance from the well. In this study, we scale-up the experimental results using a radial bank-propagation model. The comparison of liquid injectivity estimated from conventional foam simulators (Peaceman equation) and the bank-propagation model show that the conventional foam models cannot represent the effect of the superficial-velocity-dependent fluid properties during liquid injection in a SAG process. The shear-thinning behavior can lead to much better liquid injectivity than expected, which should be accounted for in a field application of a SAG foam process.

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